Friction-clutch.



I1. II IIOSIIIIIHIRNB.

PRICIION CLUTCH APPLICATION FILED 111111.20, 1911. i j 1,049,604." Patented Jan. 7, 191-3.

2 sHIIETssHEBT 1.

R. B. ROSBWARNB.

FRIGTION CLUTCH.

APPLIGATION FILED 1111111.20, 1911.

11,049,604. Y i Patented Jan.7,1913.

2 SHEETSTSHEETZ.

wi www UNITED STATES :PATENT OFFICE.

RICHARD E. ROSEWABNE, OF COVINGTON, KENTUCKY, ASSIGNOR T THE MILLER,

DU BRUL & PETERS .MANUFACTURING COMPANY, OF CINCINNATI, OHIO, A. COB- PORATION OIEV OHIO.

FBICTION-CLUTCH.

.To all whom t may concern:

Be it known that I, RICHARDCE. Rosn- WARNE, a citizen of the United States, re-

siding in the city of Covington, county of Much less power is required to transmit the same load to or from a member having a plurality. of faces clamped betweentwo opposed members.

In carrying out my lnvention, I employ va' friction clutch of the clamping type, of

simple design, which will .be light 1n construction and require a small operating force relatively to the load transmitting ca pacity of the clutch. 4 l

f To these ends, the clutchcomprises a pulley or other member to or from which r0- tation is to be imparted, having an inwardly extending radial liange provided with suitably presented friction faces, preferably, though not necessarily, at an angle that develops wedging action; a shaft upon which'said member is loosely mountedgand to or from which rot-ation is to be imparted, a pair of movable clamping flanges having near their outer edges friction faces conforming to those of the flange on the loose member; means for drawing the movable clamping disks together upon the pul1ey, or. loosemember flange, such, for instance, as levers fulcrumed upon one of the movable flanges and having bearing against the other in a direction to force the movable flanges together and with, free ends swung outwardly y meanssuch as al spreading cone; certain features ofrconstruction being embodied in the several parts which .adapt them Yto bet- K Specicatiolfof Letters Patent.

Application led March 20, 1911. Serial No. 615,581.

ace, require great force and extensive "ter perform their several functions andinsure the eiiciency and durability of .the device.

Y The invention consists in novel features hereinafter particularly pointed out in the claims.

Ihe invention will beV fully understood upon reference to the accompanying drawing in which,

Figure 1 is an axial section, and Fi end view of one embodiment of the 2 an umh;

. Patented Jan. 7, 1913. l

and Fig. 3 is a view similar to Fig. 1, showing a modification of the friction members.

and their separating spring.

A represents a member (for purposes of illustrationshown in the form of a band pulley) with which driving connection is to be established and B represents-a driving or driven shaft u on which the memberv A is loosely ymounte through the medium of a bushing c?, having a limiting shoulder as and a fixing pin of.

C represents a iange carried by the loose member (pulley) A and projecting radiall inward in position vto be clamped; whic flange, when said member is in the form -of a pulley, may obviously be castv integral with sald member A, or may be'made separate, of material especially adapted for friction clutch purposes,.and conveniently applied so as to .be removable when worn,

by fittin l it to the face'a on 'the pulley and bolting t to bosses a1 of said pulley.

D and E represent movable clampingV iianges adapted to be forced toward each other and made to` clamp the loose-member ange C between them, by any suitableA means. Flange C and anges D and E have friction faces, .b which they contact at any desired angle o presentation, such, for instance, as the square faces shown at c1, c1 in Fig. 3, but they are preferably presented in inclined position as shown at' c, c, Fig. 1, at an angle suiicient to develop some wedging action, yet insuliicient to cause binding.

The movable clampin mounted upon the shaft by providing one of them, for-instance the ange E, w1th a hub. e fitting the shaft B and the other flange (D) with a sleeve d, which adapts it to 100 l flanges D, E are slide upon the hub e. The key b passing through the shaft and entering the hub e, fixes movable flange E against rot-ation on the shaft B while permitting it to move axially thereon. Movable flange D is nonrotatably but slidably held relatively to flange E, b the projections all (also constituting fu crum ears to be described) on the :flange D, projecting through apertures e1 in the flange E. To forcibly set the movable flanges D, E up against the radial flange C, one of said movable flanges, preferably the flange D is provided with pairs of fulcrum ears d1, each of which pairs extends through an opening e1 in the other flange and provides a fulcrum-bearing f, for bent fulcrum levers F, working between the ears, and in such position as to permit short ends f1 of said levers to bear against the outer face of the flange E, preferably through the medium of a hardened plate e2, while the long, free ends of the levers F project through bot-h flanges tov a point sufliciently distant to develop powerful leverage, and where said levers are provided with adjustable bearing studs f2 extending inwardly to a spreading cone G, against which they bear. The cone G is provided with the usual wrist bearing g for connection with an adjusting arm in a well known manner, and is loosely mounted on the shaft B so that it may be forced axially beneath the lever studs f2 to throw the levers F outward and force the disks together when driving connection is to be established, and withdrawn from beneath said studs and `permit levers F to be swung inwardly by' the separating movement of the flanges D, E under the reaction of the springs I, when the driving connection is tobe interrupted.

In order that the movable flanges may be held out of contact with the radial flange C,

when relative rotation is taking placel between the said parts, they are provided withagainst the shoulder as, by means of a spring H, interposed between the hub e and the ring k1 fixed upon the shaft B by means' of a pin h2, while the springs I interposed between flanges D and E, force the flange D away from radial flange Cha dist-ance permitted by the levers F.

According to the embodiment shown in Fig. 3, the spring H1, interposed between hub and flange d2 on sleeve d, has sufficient expansion to spread the movable flanges till they are arrested respectively by the shoulder a, and ring k1, which shoulder and ring are so located as to. hold the expanded pair spaced on either side of the radial flange.

The operation of the device is as follows :-A shipping lever or controllin arm,v

the levers F outward, draws the movable v flanges D, E together,` `pressing their friction faces at c or c1 against the corresponding faces of the radial flange, with a resulting friction, much greater than results from merely drawing together two faces. In the form shown in Fig. 1, the friction is developed not simply by the spreading force exerted against the levers F, but also b the wedging angle of the faces c. The sha B will then be in firm driving connection with the pulley A. When the cone vG is moved in the opposite direction, the springs H and I, in Fig. l, or the singe sprin H1 in Fig. 3 force the flanges D, away om the flange C. This separation of the flanges throws the free ends of the levers F inward,

in position to be impinged against by the' cone G when it is again desired to throw the clutch to restablish driving connection. I claim: 1. A friction clutch comprising a pair of radial clamping flanges, a member having a radial flange extending between said clamp- Y Abears but carried by the opposing clamping flange, and means for swinging the vlevers l radially outward to draw the clamping i flanges together uponthe intervening flange;

the abutting faces of the clamping flanges and, the intervening flange being inclined to develop a wedging action in the operation of the clamp. i

2. vIn a friction clutch, the combination of the members between which driving connection is to be established, a radial clam ing flange non-rotatably connected to one of said members, means for clamping said radial flange, non-rotatably conn ted to but axially movable on the other o said members, comprising a pair of opposed movable clamping flanges adapted to be dra-wn together against faces of thel radial flange, clamping levers carried by one of said movable flanges and engaging the other of said movable flanges, means for spreading said.

' 3. In a friction clutch having two clamp-y ing members adapted to be drawn together loo upon a third member, means for so drawing extending through both lclamping members, I

together the clamping members, and interand means for actuating said levers.. 10y

locking them against relative rotation, com- The foregoing specification signed at Cinprising fulcrums carried by one clamping clnnat this third day of March, 1911.

' 5 member and extending in an axial direct-ionl RICHARD E. ROSEWARNE.

through the other clamping member, levers In presence offor drawing said clamping members to- H. WHYBIGH,

gether, mountedl upon said fulcrums, and vW. J. HUNTER. 

